Guiding device for tube-mills.



No. 693,381. Patenfedireb. |z3r,-|9oz'z.l

y w. mous. f vGUIDING DEVICE FOR' TUBE MIL-LS.

` (Applipgsion med my m, 1901.)

(No Model.)" l l n TN: Norms PETERS 0D.. PHDTo'LIYNo.. wAsmNnYoN D c UNiTED STATE-s PATENT FFICE..A

VILLIAM DICKS, OF BEAVERFALLS, PENNSYLVANIA, ASSIGNOR OF ONE-4 HALF TO GEORGE H. BLAXTER, OF PITTSBURG, PENNSYLVANIA.

GUIDING DEVICE FOR TUBE-MILLS.

SPIEGIFMLAJEIOLT forming part of Letters Patent No. 693,381, dated February 18, 1,902.

Application filed May k16, 1901. l

To all wwn/t 2323 may concern:

Be it known that I, WILLIAM DICKs, a citizen of the United States, residing at Beaverfalls, in the county of Beaver and State of Pennsylvania, have invented or discovered a new and useful Improvement in Guiding Devices for Tube-Mills, of which the following is a full, clear, and exact description, refer'- ence being had to the accompanying drawings,`forming part of this specilication, in which- Figure 1 is a view in side elevation of a piercing-mill provided'with my improvement. Fig. 2 is a horizontal sectional view indicated by the line ll ll of Fig. l, illustratingr the commencement of the operation. Fig. 3 is a similar view at the end of the operation. Fig. 4 is a perspective view of the bushing.

My invention relates to the art of piercing blanks for seamless tubing; and it consists ina device for preventing free movement of the advancing-end of the shell as it travels over and away from the piercing point or plug.

Heretofore in piercing or expanding long billets the forward end of the shell has been unrestrained, `so that it was free to drop down onto the supporting-bar for the plug, and' also by reason of the high rotating velocity the end was free to vibrate and whip violently around the bar, tending to distort the hollow billet and injure the bar, while preventing the manufacture of aperfect billet. My invention is designed to overcome this trouble in the manner hereinafter set forth.

Referring to the drawings, 2 3 are the disks of the mill, of diiferent diameters, having the same peripheral speed., rotating in opposite directions, as indicated, and verticallyoset above and below each other, so as to secure the forward feed of the billet due to such arrangement, in thel manner well understood and practiced in this art.

4 is the piercing plug or point, located midway between the different horizontal centers and suitably located with relation to the disks to penetrate the billet as it is advanced, the plug being secured upon the end of the usual bar 5, free to rotate and positively held in position by a rigid bearing at the opposite Serial No. 60.492. (No model.)

forward hollow end of the pierced billet as it advances, whereby` such end of thebillet will embrace it with a comparatively tight it. As the billet continues to advance it will push the bushing ahead of it out of its bearing in the guiding-frame G and along the bar to the limit of travel of the billet until it is finished` as indicated in Fig. 3, and during such operation `the bushing will provide a positive central bearing for the billet, holding it steadyand entirelyovercom'ing the whipping action referred to. i At the end of the rolling operation the bar and the hollow billet are removed, the billet is disengaged, and the bar and bushing are again adjusted in position ready for another operation. In cases Where an already-pierced billet is again passed over an enlarging-plug the bushingr isemployed in the same manner as has been described, with the same beneficial results.

The advantages of my invention will be appreciated by those skilled in the art, and in practice I havefound that it entirely overcomes the objections noted andl provides a simple, cheap, and efficient remedy therefor.

Having described my invention, what I claim isl. In combination with the supporting-bar for the'plug or point of a piercing-mill; a bushing slidingly mounted on the bar and provided with a tapered extension adapted to enter the hollow billet and to slide with it along the bar. Y

2. In combination with the supporting-bar for the plug or point of a piercing-mill; a bushing slidingly mounted on the bar, adapted to support the end of the hollow billet in alinement with the bar and to slide with it along the bar.

3. A deviee for the purpose described oomprising a circular tapered bushing adapted to slide upon the bar supporting the plus` or point, and to enter the hollow billet.

4. In combination with the disks or rolls of a piercing-mill, a plug or point and the supporting-bar therefor, a tapered bushing slidingly mounted on the bar, adapted to enter the hollow billet.

5. In combination with the disks or rolls of a piercing-mill, a plug or point, a supportingbar therefor, and a guiding-frame; a tapered bushing slidingly mounted upon the bar,

Signed at Beaverfalls, Pennsylvania, this 25 9th day of April, 1901.

WILLTAM IDIOKS. lVitnesses:

EDWARD M. WOLFE, LOUIS C. Coi-mus. 

